df is a Linux command for for reporting file system disk usage on a Linux system. While brewing coffee at home I found the following. How to view disk usage using df command? Simple! Simplest way is just to type df on the command line and you should get the below output: Filesystem …
Category Archives: Linux
Runlevels in Linux simple table
Hola! Each runlevel has a certain number of services stopped or started, giving the user control over the behavior of the machine. Conventionally, seven runlevels exist, numbered from zero to six. While brewing coffee at home I found the difference between runlevels in Linux. See below. Runlevel Mode Definition 0 Halt Shuts down the system. …
Default Apache virtual host file in Ubuntu
I was asked the other day ‘How does the default Apache virtual host file looks like?’ I was having my Peruvian coffee and decided to place below the default Apache virtual host file in this post for any future reference. <VirtualHost *:80> ServerName www.example.com ServerAdmin webmaster@localhost DocumentRoot /var/www/html ErrorLog ${APACHE_LOG_DIR}/error.log CustomLog ${APACHE_LOG_DIR}/access.log combined </VirtualHost> Super …
Continue reading “Default Apache virtual host file in Ubuntu”
Linux File Systems ext2, ext3 and ext4
While having coffee at home I decided to put this table together regarding Linux File Systems and their differences. Let me know if I’m missing something. Ext2 Ext3 Ext4 Stands for Second Extended file system. Stands for Third Extended file system. Stands for Fourth Extended file system. Introduced in 1993. Introduced in 2001. Introduced in …
Copying files rsync Linux use of “/” at the end of path
Hello, sometimes we need to copy files and we are not sure when to use “/ ” at the end of the path. Copying files rsync while brewing coffee at home this is what I found. Check this useful summary:
How to Change Root Password in Ubuntu Linux
The root user is disabled by default in Ubuntu. This does not mean the account was removed. After researching while having amazing coffee from Latin America I found the following… If for some reason, you need to enable the root account, all you need to do is to set a password for the root user. In …
Continue reading “How to Change Root Password in Ubuntu Linux”
Install mkpasswd in Ubuntu by installing whois
Hola, I ran into the below issue while trying to install mkpasswd in Ubuntu. sudo apt install mkpasswd Reading package lists… Done Building dependency tree Reading state information… Done E: Unable to locate package mkpasswd Turns out that mkpasswd is a utility part of the whois package. So, in order to get mkpasswd you have …
Continue reading “Install mkpasswd in Ubuntu by installing whois”
Enable Password Authentication on your droplet Digital Ocean
This one is quite simple. You will need to modify the ssh config file which is located at /etc/ssh/sshd_config. Open the /etc/ssh/sshd_config file with your favorite editor. Find or add the line PasswordAuthentication Enter the value ‘yes’ next to PasswordAuthentication It should look like: PasswordAuthentication yes Save and exit the file. The restart the ssh …
Continue reading “Enable Password Authentication on your droplet Digital Ocean”
How to Recover from Lost SSH Keys Digital Ocean
Hola! This happen on a couple of occasions to me. First, you will need to force your droplet to generate a new root password. Select your droplet from the Droplets menu. You will be presented with the option to reset root password. Click on the ‘Reset Root Password’ button and a new root password will …
Continue reading “How to Recover from Lost SSH Keys Digital Ocean”